package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @createTime: 2024/01/12 0:24
 * @LastEditors: yx
 * @LastEditTime: 2024/01/12 0:24
 */
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    /**
     * 统计时间区间内营业额
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        // 当前集合存放从begin到end范围内每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        // 计算日期
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 查询日期对应的营业额
        // 存放每天营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            // 当前日期状态为已完成的订单量
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        String dateString = StringUtils.join(dateList, ",");
        String turnoverString = StringUtils.join(turnoverList, ",");
        return TurnoverReportVO
                .builder()
                .dateList(dateString)
                .turnoverList(turnoverString)
                .build();
    }

    /**
     * 统计时间区间内用户数量
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        // 当前集合存放从begin到end范围内每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        // 计算日期
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 每天新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        // 总用户数量
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            // 当前日期状态为已完成的订单量
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);
            // 总用户数量
            Integer totalUser = userMapper.countByMap(map);
            // 新增用户
            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        UserReportVO vo = UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
        return vo;
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        // 当前集合存放从begin到end范围内每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        // 计算日期
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 每天订单总数
        List<Integer> orderCountList = new ArrayList<>();
        // 每天有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            // 查询每天订单总数
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            // 查询每天有效订单数
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        // 计算时间区间内的总数  遍历集合累加
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer totalValidOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        // 计算订单完成率
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = totalValidOrderCount.doubleValue() / totalOrderCount;
        }
        // 封装vo数据
        OrderReportVO vo = OrderReportVO.builder().dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(totalValidOrderCount)
                .build();
        return vo;
    }

    /**
     * 销量前10统计
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        // 当前集合存放从begin到end范围内每天的日期
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> sealsTop10 = orderMapper.getSealsTop10(beginTime, endTime);
        List<String> names = sealsTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");
        List<Integer> numbers = sealsTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        SalesTop10ReportVO vo = SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
        return vo;
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {

        // 查询最近30天相关数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        LocalDateTime beginTime = LocalDateTime.of(dateBegin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(dateEnd, LocalTime.MAX);
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(beginTime, endTime);
        // poi写入相关数据到excel
        InputStream in = getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            // 新建excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);
            // 填充数据
            XSSFSheet sheet = excel.getSheet("Sheet1");
            // 填充时间
            sheet.getRow(1).getCell(1).setCellValue("时间" + dateBegin + "至" + dateEnd);
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            // 明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime
                        .of(date, LocalTime.MAX));
                row = sheet.getRow(i + 7);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            // 下载文件到客户端
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);


            // 关闭资源
            outputStream.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }


    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);
        return orderMapper.countByMap(map);
    }
}
